Prince Charles makes millions from his watercolor paintings

According to The Telegraph, Prince Charles is one of the most successful British artists alive. "It's a good discipline, if nothing else," Prince Charles sad in an A&E documentary.

The outlet reports he's made 2 million pounds — that's close to $3 million — since 1997 off copies of his watercolors. And he donates the earnings to his charitable foundation.

See images of the prince and his work:

13PHOTOS

Prince Charles Painting Watercolor

See Gallery

Prince Charles makes millions from his watercolor paintings

KLOSTERS, SWITZERLAND - JANUARY 01: Prince Charles Agreed To Have One Of His Watercolour Paintings Of Klosters (done In 1992) Used For The Ski Pass For The 1997 Season. (Photo by Tim Graham/Getty Images)

GREAT BRITAIN - MARCH 01: Royal Mail stamps marking the 25th anniversary of the Prince of Wales' investiture, The watercolours are by Prince Charles (Photo by Tim Graham/Getty Images)

GREAT BRITAIN - MARCH 01: Royal Mail stamps marking the 25th anniversary of the Prince of Wales' investiture, The watercolours are by Prince Charles (Photo by Tim Graham/Getty Images)

BALMORAL, UNITED KINGDOM - MARCH 01: Prince Charles's Watercolours Paintings Published In A Book Called Hrh The Prince Of Wales Watercolours Published In The 1990s. Here Is His Painting Of Balmoral Castle. (Photo by Tim Graham/Getty Images)

UNITED KINGDOM - MARCH 01: Prince Charles's Watercolours Paintings Published In A Book Called Hrh The Prince Of Wales Watercolours Published In The 1990s. Here Is His Painting Of The Spittal Of Glen Muick Near Balmoral Castle. (Photo by Tim Graham/Getty Images)

The curator of the Royal Collection Lady Jane Roberts holds a water color painted by Britain's Prince Charles during a photocall for the exhibition 'HRH The Prince of Wales: An Exhibition to Celebrate his Sixtieth Birthday' at Windsor Castle, in Berkshire, south-east England, on May 15, 2008. The painting, depicting an abandoned cottage on the Island of Stroma, Caithness, Scotland, is part of the exhibition 'HRH The Prince of Wales: An Exhibition to Celebrate his Sixtieth Birthday.' Prince Charles will celebrate his sixtieth birthday on November 14, 2008. The exhibition will run until February 22, 2009 AFP PHOTO/Max Nash (Photo credit should read MAX NASH/AFP/Getty Images)

The curator of the Royal Collection Lady Jane Roberts holds a water color painted by Britain's Prince Charles during a photocall for the exhibition 'HRH The Prince of Wales: An Exhibition to Celebrate his Sixtieth Birthday' at Windsor Castle, in Berkshire, south-east England, on May 15, 2008. The painting, depicting an abandoned cottage on the Island of Stroma, Caithness, Scotland, is part of the exhibition 'HRH The Prince of Wales: An Exhibition to Celebrate his Sixtieth Birthday.' Prince Charles will celebrate his sixtieth birthday on November 14, 2008. The exhibition will run until February 22, 2009 AFP PHOTO/Max Nash (Photo credit should read MAX NASH/AFP/Getty Images)

The curator of the Royal Collection Lady Jane Roberts holds a water color painted by Britain's Prince Charles during a photocall for the exhibition 'HRH The Prince of Wales: An Exhibition to Celebrate his Sixtieth Birthday' at Windsor Castle, in Berkshire, south-east England, on May 15, 2008. The painting, depicting an abandoned cottage on the Island of Stroma, Caithness, Scotland, is part of the exhibition 'HRH The Prince of Wales: An Exhibition to Celebrate his Sixtieth Birthday.' Prince Charles will celebrate his sixtieth birthday on November 14, 2008. The exhibition will run until February 22, 2009 AFP PHOTO/Max Nash (Photo credit should read MAX NASH/AFP/Getty Images)

See more of Prince Charles and Camilla, Duchess of Cornwall through the years:

29PHOTOS

Prince Charles and Camilla

See Gallery

Prince Charles makes millions from his watercolor paintings

WINDSOR, UNITED KINGDOM - APRIL 09: TRH Prince Charles & The Duchess of Cornwall, Camilla Parker Bowles depart the Civil Ceremony where they were legally married, at The Guildhall, Windsor on April 9, 2005 in Berkshire, England. (Photo by Georges De Keerle/Getty Images)

LONDON, ENGLAND - MAY 10: Prince Charles, Prince of Wales leaves the VE Day 70th Anniversary service at Westminster Abbey on May 10, 2015 in London, England. (Photo by Danny E. Martindale/Getty Images)

The Prince of Wales and his new bride Camilla, Duchess of Cornwall, with their families (L-R back row) Prince Harry, Prince William, Tom and Laura Parker Bowles (L-R front row) Duke of Edinburgh, Britain's Queen Elizabeth II and Camilla's father Major Bruce Shand, in the White Drawing Room at Windsor Castle, after their wedding ceremony. (photo: Anwar Hussein)

In this handout from Royal Mail an image of a new stamp featuring HRH Prince Charles and Camila Parker Bowles is seen. A series of stamps will be released on the day of the royal wedding in April. The last set of Royal issue stamps was brought out to commemorate Prince William?s 21st birthday in July 2003. (Photo by Royal Mail via Getty Images)

In this handout from Royal Mail a composite image of new stamps featuring HRH Prince Charles and Camila Parker Bowles is seen. A series of stamps will be released on the day of the royal wedding in April. The last set of Royal issue stamps was brought out to commemorate Prince William?s 21st birthday in July 2003. (Photo by Royal Mail via Getty Images)

Britain's Prince Charles and his bride Camila Duchess of Cornwall leave St George's Chapel in Windsor following the church blessing of their civil wedding ceremony, 09 April 2005. In the background is Britain's Queen Elizabeth. Prince Charles married Camilla Parker Bowles, the true love of his life, on Saturday in a private civil ceremony that inevitably paled against his storybook wedding to Princess Diana more than 20 years ago. (Photo credit: ALASTAIR GRANT/AFP/Getty Images)

WASHINGTON, DC - MARCH 19: Charles, Prince of Wales sits as he attends a meeting with United States President Barack Obama (not pictured) in the Oval Office of the White House on March 19, 2015 in Washington, D.C. The Prince and Duchess are in Washington as part of a Four day visit to the United States. (Photo by Ron Sachs-Pool/Getty Images)

JINJA, UGANDA - NOVEMBER 24: HRH Camilla, Duchess of Cornwall and Prince Charles, Prince of Wales pose for a photograph at the source of the White Nile on November 24, 2007 in Jinja, Uganda. The Prince and Duchess are in Uganda during the Commonwealth Heads of Govenment Meeting. (Photo by Chris Jackson/Getty Images)

WINDSOR, ENGLAND - APRIL 09: TRH Prince Charles and his wife The Duchess Of Cornwall, Camilla Parker Bowles meet the crowd following the Service of Prayer and Dedication after their marriage at The Guildhall, at Windsor Castle on April 9, 2005 in Berkshire, England. (Photo by Dave Hogan/Getty Images)

Britain's Prince Charles, Prince of Wales, and his wife Camilla, Duchess of Cornwall, arrive at Andrews Air Force Base in Maryland on March 17, 2015 for a four-day visit to the US.(Photo credit: NICHOLAS KAMM/AFP/Getty Images)

WASHINGTON, DC - MARCH 18: Camilla, Duchess of Cornwall and Prince Charles, Prince of Wales visit the Lincoln Memorial on the second day of a visit to the United States on March 18, 2015 in Washington, DC. The Prince and Duchess are in Washington as part of a Four day visit to the United States. (Photo by Chris Jackson/Getty Images)

LONDON, ENGLAND - MARCH 13: Prince Charles, Prince of Wales speaks with armed forces personnel during a reception at Guildhall, after the Afghanistan service of commemoration at St Paul's Cathedral on March 13, 2015 in London, England. (Photo by Toby Melville - WPA Pool / Getty Images)

LONDON, United Kingdom: FILES - Picture taken 14 November 2002 shows Britain's Prince Charles (R) and his companion Camilla Parker-Bowles leaving the Ritz hotel where a private party was held to celebrate the succes of her jubilee in central London. Prince Charles and Camilla Parker-Bowles will marry in Scotland in the coming autumn, a German royal expert and author said 18 May 2004. (Photo credit: NICOLAS ASFOURI/AFP/Getty Images)

SANDRINGHAM, ENGLAND - JULY 31: Prince Charles and Camilla Parker Bowles arrive together to attend the Sandringham Flower Show on the Royal Sandringham Estate July 31, 2002 in Norfolk, England. Camilla's arrival with Charles, suggests an effort on the part of the British Royal Family to introduce her to more public Royal duties due to her relationship with the Prince. (Photo by Sion Touhig/Getty Images)

GLOUCESTERSHIRE, ENGLAND - JULY 27: Britain's Prince Charles attends a polo match at the Beaufort Polo Club for The Ronnie Wallace Memorial Trophy in aid of The Hunt Servants' Benefit Society July 27, 2002 in Glocestershire, England. (Photo by John Li / Getty Images)

LONDON - JULY 20: Camilla Parker-Bowles enjoys the speech by the Prince of Wales to London black taxi drivers, during a garden reception in the grounds of Clarence House, on July 20, 2004 in London. (Photo by ROTA/Getty Images)

LONDON, UNITED KINGDOM: The Prince of Wales and Camilla Parker Bowles arrive for a charity concert, 11 November 2004 to celebrate the career of music producer Trevor Horn. Charles's partner joined him as he attended the official engagement, titled Produced By Trevor Horn, a concert for the Prince's Trust at London's Wembley Arena. (Photo credit: ANDREW PARSONS/AFP/Getty Images)

WINDSOR, UNITED KINGDOM: Prince Charles and Camilla Parker Bowles arrive for a party at Windsor Castle after announcing their engagement earlier 10 February, 2005. Britain's Prince Charles and his longtime companion Camilla Parker Bowles are to marry, his office announced Thursday, putting the official seal on a relationship that first blossomed 35 years ago. (Photo credit: JOHN STILLWELL/AFP/Getty Images)

WINDSOR, UNITED KINGDOM: Camilla Parker Bowles shows off her engagement ring as she and Prince Charles arrive for a party at Windsor Castle after announcing their engagement earlier 10 February, 2005. Britain's Prince Charles and his longtime companion Camilla Parker Bowles are to marry, his office announced Thursday, putting the official seal on a relationship that first blossomed 35 years ago. (Photo credit: JOHN STILLWELL/AFP/Getty Images)

GLOUCESTERSHIRE, ENGLAND - MARCH 13: HRH Prince Charles (L) and fiancee Camilla Parker Bowles leave church accompanied by the Rev. Christopher Mulholland, following the Sunday service at St Lawrence Church on March 13, 2005 in Gloucestershire, England. (Photo by Getty Images)

The Prince of Wales, and his new wife, Camilla Parker Bowles, the Duchess of Cornwall (Photo by Anwar Hussein Collection/ROTA/WireImage)

HRH Prince Charles and Camilla Parker Bowles during The Royal Wedding of HRH Prince Charles and Mrs. Camilla Parker Bowles - Outside at Guildhall in Windsor, Great Britain. (Photo by Anwar Hussein/WireImage)

WINDSOR, ENGLAND - APRIL 09: HRH Prince Charles & The Duchess of Cornwall, Camilla Parker Bowles depart the Civil Ceremony where they were legally married, at The Guildhall, Windsor on April 9, 2005 in Berkshire, England. (Photo by Georges De Keerle/Getty Images)